Good point! For some reason, PostNuke pops up that message, even though it only lets you vote on the poll once (rather than daily). Perhaps it's a stock message for sites that change their polls every day. Thanks for pointing that out -- I'll fix it shortly!

OK, having logged out and back in, I can vote again -- but then trying once more results in the 'already voted today' message. PostNuke's standard polls module is barely configurable; daily votes and that's it. We could start using a more advanced poll module -- perhaps we should have a poll on that?